Zitadel up to 4.17.1 improper authentication

Summaryinfo

A vulnerability was found in Zitadel. It has been classified as critical. This issue affects some unknown processing. Performing a manipulation results in improper authentication. This vulnerability is cataloged as CVE-2026-105208. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Zitadel. It has been classified as critical. This affects an unknown code block. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

ZITADEL 4.x before 4.17.3 and 3.x through 3.4.15 protects IdP intent tokens with unauthenticated, malleable encryption, allowing authenticated users to tamper with their own token so it is accepted for another user's external login intent. An attacker who predicts a victim's in-flight intent identifier and wins a timing race can call /v2/idp_intents or /v2/sessions to steal the victim's IdP tokens or hijack their session.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-105208 since 10/04/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 4.17.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-92101). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

• Zitadel

Version

• 1.80.0-v2.20.0.20260317120401-d90285929ca0
• 1.87.1
• 2.2.0
• 2.37.3
• 2.38.0
• 2.38.2
• 2.38.3
• 2.39.1
• 2.39.2
• 2.39.9
• 2.40.4
• 2.40.9
• 2.40.10
• 2.41.5
• 2.41.6
• 2.41.15
• 2.42.14
• 2.42.15
• 2.42.17
• 2.43.8
• 2.43.10
• 2.43.11
• 2.43.92.46.1
• 2.44.2
• 2.44.3
• 2.44.6
• 2.44.7
• 2.45.0
• 2.45.1
• 2.45.4
• 2.45.5
• 2.45.7
• 2.46.0
• 2.46.1
• 2.46.4
• 2.46.5
• 2.46.6
• 2.46.7
• 2.47.3
• 2.47.7
• 2.47.8
• 2.47.9
• 2.47.10
• 2.48.2
• 2.48.3
• 2.48.4
• 2.48.5
• 2.49.4
• 2.49.5
• 2.50.2
• 2.50.3
• 2.52.3
• 2.53.8
• 2.53.9
• 2.54.5
• 2.54.7
• 2.54.8
• 2.54.10
• 2.55.1
• 2.55.4
• 2.55.5
• 2.55.7
• 2.55.8
• 2.56.1
• 2.56.2
• 2.56.5
• 2.56.6
• 2.57.0
• 2.57.1
• 2.57.4
• 2.57.5
• 2.58.0
• 2.58.1
• 2.58.4
• 2.58.5
• 2.58.6
• 2.58.7
• 2.59.2
• 2.59.3
• 2.59.4
• 2.59.5
• 2.60.1
• 2.60.2
• 2.60.3
• 2.60.4
• 2.61.0
• 2.61.1
• 2.61.2
• 2.61.3
• 2.61.4
• 2.62.0
• 2.62.1
• 2.62.6
• 2.62.7
• 2.62.8
• 2.63.4
• 2.63.5
• 2.63.6
• 2.63.8
• 2.63.9
• 2.64.0
• 2.64.1
• 2.64.4
• 2.64.5
• 2.64.6
• 2.65.5
• 2.65.6
• 2.65.7
• 2.66.10
• 2.66.11
• 2.66.15
• 2.66.16
• 2.67.7
• 2.67.8
• 2.67.12
• 2.67.13
• 2.68.3
• 2.68.4
• 2.68.8
• 2.68.9
• 2.69.3
• 2.69.4
• 2.69.8
• 2.69.9
• 2.70.0
• 2.70.1
• 2.70.7
• 2.70.8
• 2.70.10
• 2.70.12
• 2.70.14
• 2.71.5
• 2.71.6
• 2.71.8
• 2.71.9
• 2.71.10
• 2.71.12
• 2.71.13
• 2.71.15
• 2.71.17
• 2.71.18
• 2.71.19
• 3.0.0
• 3.2.1
• 3.2.2
• 3.3
• 3.3.0
• 3.3.1
• 3.4.0
• 3.4.2
• 3.4.3
• 3.4.4
• 3.4.5
• 3.4.6
• 3.4.7
• 3.4.8
• 3.4.9
• 3.4.10
• 3.4.11
• 3.4.12
• 3.4.13
• 3.4.14
• 3.4.15
• 4.0.0-rc.1
• 4.0.2
• 4.0.3
• 4.5
• 4.6.0
• 4.6.3
• 4.6.5
• 4.6.6
• 4.7.1
• 4.7.2
• 4.9.0
• 4.9.1
• 4.10
• 4.11.0
• 4.11.1
• 4.12.0
• 4.12.1
• 4.12.2
• 4.12.3
• 4.14
• 4.15.0
• 4.15.1
• 4.15.2
• 4.15.3
• 4.16.0
• 4.16.1
• 4.16.2
• 4.17.0
• 4.17.1

Website

• Product: https://github.com/zitadel/zitadel/

CPE 2.3info

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Entryinfo

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